Rotary well-boring pipe coupling



o. a. KIBELE ROTARY WELL BORING PIPE COUPLING Filed March 1 1922 fif 2- :e K 15L r f5 4 Z 4 (0k 8.? -35 I v e/ Patented J uly l, 1924.

o'r'ro BIKIBE E, or Los snennns camronnm;

ROTARY WELL-Bonnie PIPE cournma- Application filed March 1, 1922. Serial No. 540,831.

To all whom'it may concern."

Be it known that I, Or'ro' B. Knsnnn, a

citizen of the United States, residing at Los I Angeles and.

Angeles, in the ounty of Les State of California, have invented new and useful Im rovements in Rota Well-Boring Pipe ouplings, of which the following is a specification.

- boring apparatus, and more particularly to an improved coupling for the tube or cas ing sections that extend downwardly into thewell and which coupling may also be utilized between a boring pipe section and to provide a strong and substantial joint between the connected members, and further to provide a coupling that provides a strong and substantial joint between tube or casing sections or between -a tube or casing member and a tool receiving member or socket.

With the foregoing and other objects in.

.view, my invention consists in certain novel features of construction and arrangement of parts that will be hereinafter more fully described and claimed and illustrated in the accompanying drawings, in' which- Fig. 1 is a vertical section taken lengthwise through the center of a coupling of my improved construction and showing the same applied to the adjacent ends of-a pair of tube or casing sectionsQ Fig. 2 is ahorizontal section taken approximately on the line 2-2 of Fig. 1.

Fig. 3 is a vertical section taken lengthwise through a coupling member of the type that is utilized for the attachment of a drill or cutting tool to a tube or casing section.

Fig; 4 1s a cross section taken on the line 4-4 of Fig. 3.

My invention, relates generally to well the socket member that carries therotarying tapered outwardly lap the engaged tube section or casing so as g ing drawingsand particularly to the form of coupling-illustrated in Figs'. 1 and 2,10 designates a main body portion of the couplingmember, the same being substantially cylindrical in form and its external diame 'ter being practically the same as the external diameter of the tube or casing sections thatare to beunited by the coupling. Formed, integral with. the ends of the body 10 are extensions'll, the external diameters cf which are less than the diameter of the body 10 and the external surfaces of said extensions 11 are provided with circumferentially disposed, ribs or' grooves 12, the outer edges'of whichare adapted to engage Referring by numerals to the accompany-'- the inner surfaces'ofthescasing. or tube sections that are joinedby the coupling.

Formed through body {10 and its extensions 11 is an axially dis osed bore or passage'way-13, the end portlons M'thereof beand. 'QOmmunicating with the interior '0 e casing or tube sections that are connected by the coupling.

The shoulders 15 that are formed between the body 10 and the extensions 11 of smaller diameter are inclined or beveled, the arrooves are provided for the reception of the ends of the casing 'or tube sections 16 that are joined by the coupling, and in order to provide a snug fitbetween the parts at these shoulders or under cut grooves the ends of the'tube or casing sections 16 are inclined or beveled to correspond with the inclination of the faces of the undercut grooves. I

In assembling the coupling the casing or tube sections 16' are-driven onto the end portions 11 of the' coupling member 10 until the ends of said sections fit snugly within the under cut. grooves between the body 10 of the coupling andthe reduced end portions 11, after which the casing or tube sections are rigidly secured to the tubular end portions 11 by spot welding through the overlapping portions of sai tube or casing sections and the tubular end portions 11. Whenthe tube or casing sections 16 are driven onto the tubular extensions 11 the annular ribs or corrugations on the peripheral surfaces of the latter engage the inner surfaces of the tube or cas ing sections and materiallyassist in retaining the parts in assembled relation.

-slightly larger in diameter than the at its lower end wit 'When the coupling has been properly applied to-the adjacent ends of a pair of casing or tube sections a very strong and substantial joint is produced and there are no external shoulders formed adjacent to the joint to interfere with the free movement of the connected tube or-casing sections as they are lowered onto or raised from the,

well hole.

In the modified construction illustrated in Fig. 3 the couplin body 18 is provided a depending externall threaded .taered cylindrical member 19 that is adapte to receive the internall threaded upper end of a tool such as a dri'l or' a rotary cutter, and formed integral with the upper end of the body 18 is an axially disposed cylindrical extension 20 that is adapted to be inserted in the lower portion of a tube or casing member 21. The

periphery of this extension 20 is ribbed or corrugated circumferentially in order that the coupling member may be firmly secured to the tube or casing section. If desired, this form of coupling may be rigidly fixed tothe :tube or casing section by spot welding.

In this form of coupling the body 18 is ameter'of the tube or casing section 21 and formed on the upper margmal edge of the body 18- is an upstandin annular flange 22 and which latter provi es between it and the lower portion of the bod of extension I 20 an annular channel 23 wit in which fits snugly the lower end of the tube or casing section 21 when the parts are properly assembled. a

Formed through body 18, depending extension 19 and extension 20 is an axially disposed bore or passageway 24.

A tube or casing coupling of my improved construction is comparatively simple, may be easily and cheaply produced, is

capable of being easily and quickly connected or disconnected, and is very effective in performing its intended functions. It will be understood that minor changes in the size, form and construction of the various parts of. my tube or casing coupling may be made and substituted for.

those herein shown and described without departing from the spirit of my invention, the scope of which is set forth in the a tubular 

